00:01
To determine the mass of ethylene glycol added, we must know the data which is given and reduce the information from the data.
00:07
So first of all, we have is molar mass of ethylene glycol.
00:10
So molar mass of ethylene glycol is given to be equal to 62 .1 gram per mole.
00:23
Then we have volume of water, which is equal to 10 litre.
00:29
Density of water is equal to 1 gram per ml therefore mass of water mass h2 will be equal to density into volume the density we have is 1 gram per ml so we need to convert the volume into ml so 10 ,000 ml this gives the value as 10 ,000 gram that means 10 kg we have the mass of h2o now once we have the mass, now we can calculate the delta df value.
01:06
So when we talk about the delta df value, in this case, it is going to be equal to kf into m into i.
01:15
I is the vandau factor which is equal to one in this case, vandhoff factor.
01:23
M is the molality.
01:27
Molality.
01:30
This is depression constant, molar depression constant.
01:44
So this is going to be equal to delta df value we have is 23 .3.
01:50
Kf is 1 .86 multiplied by m...